The two inputs inside 5.01 per cent

The benchmark US 10-year Treasury yield was last up 3.51 basis points at 5.01 per cent on Monday. That was the highest since October 2023, a threshold analysts said could affect the relative appeal of US equities.[1]

Yields rose as traders priced the possibility that the Federal Reserve would need to keep rates higher for longer after a jump in oil prices revived inflation fears. Heavy debt issuance, including by companies financing AI-related spending, added to bond supply, and some investors argue widening US deficits require a higher yield premium.[1]

The level is technical; the reason is economic. 5.01 per cent is a threshold; the 3.51 basis points do not say whether oil or bond supply did the last work. Goldman Sachs and J.P. Morgan expect a 25 basis point increase at the September 15-16 meeting, and CME FedWatch prices an 87 per cent chance of a hike this month, so the policy-rate path is largely already in that meeting.[1], [2]

Diesel at 6.23 dollars a gallon

The US national average diesel price rose to 6.23 dollars a gallon on Monday, AAA reported, 30 per cent above 4.77 dollars a gallon in late June. Economists are watching diesel because it can lift broader prices.[3]

The diesel report named inflation fears as one driver of higher Treasury yields. That is the posted price of the oil-to-rates channel already in the 10-year story; 6.23 dollars makes the inflation input into 5.01 per cent visible. The supply input is read from issuance volume.[3], [1]

The Nasdaq 100's 1.8 per cent drop

The Nasdaq 100 fell as much as 1.8 per cent on Monday morning. Nvidia dropped more than 3 per cent, Arm Holdings 10 per cent and SK Hynix 7.3 per cent, and the Philadelphia Semiconductor Index plunged 6 per cent, while CrowdStrike and Palo Alto Networks surged more than 12 per cent.[4]

The session followed a Saturday essay by Anthropic chief executive Dario Amodei saying companies must slow the pace at which they improve AI model capabilities. OpenAI chief executive Sam Altman said going public this year would be ill-advised given safety concerns. Deutsche Bank's Jim Reid asked whether this is a first sign the AI investment cycle might moderate. That is the named competing account of the equity tape: AI tempo, not the yield threshold.[4]

Analysts already treated 5 per cent on the 10-year as a line that could affect the relative appeal of equities. The same tape sold long-duration AI infrastructure names while cybersecurity rose. The signal after the 15-16 September Fed decision is whether the 10-year holds at 5.01 per cent while diesel stays near 6.23 dollars. If the yield falls below 5 per cent while diesel stays high, Monday's inflation premium was the layer the meeting unwound.[1], [4], [3], [2]